Signal relay switch



Oct. 17, 1950 J. M EVORACH SIGNAL, RELAY swrrcn Filed llardh 26, 1946 Fl G. 2.

F I6. I.

INVENTOR.

JA'OK MEVORACH,

ATTORNEY Patented Oct. 17, 1950 UNITED STATES PATENT OFFICE SIGNAL RELAYSWITCH Jack Mevorach, Brooklyn, N. Y.

Application March 26, 1946, Serial No. 657,166

This invention relates to improvements in relay switches for alarmsignal systems and electrical circuits therefor.

One object of my invention is the provision therein of a magneticallyactivated armature for controlling a main and a secondary circuit of asignal system in which an electrically operated alarm or signal isprovided.

Another object of my invention is the provision therein of a pivotlymounted armature operable through the medium of alternatively activateddual magnetic units to close a secondary electrical circuit.

Another object of my invention is the provision therein of means toclose a secondary circuit when a main or primary circuit is opened,thereby activating an alarm device.

A still further object of this invention is the provision of anorganization in which the constituent elements are so arrangedstructurally and functionally as to assure improved results withmaterials and members which may be manufactured at reasonable cost, maybe easily assembled and which will be efiicient in operation withminimum wear to the parts.

This invention possesses other objects and features of advantage, someof which, with the foregoing will be set forth in the followingdescription and in the claim wherein parts will be identified byspecific names for convenience, but they are intended to be as genericin their application to similar parts as the art will permit. In theaccompanying drawings there has been illustrated the best embodiment ofthe invention known to me, but such embodiment is to be regarded astypical only of many possible embodiments, and the invention is not tobe limited thereto.

The novel features considered characteristic of my invention are setforth with particularity in the appended claim. The invention itself,however, both as to its organization and its method of operation,together with additional objects and advantages thereof, will best beunderstood from the following description of a specific embodiment whenread in connection with the accompanying drawings, in which:

Figure 1 is a view showing the units of my device mounted upon the basemember of an enclosing cabinet (not shown), and showing electricalconductor connections in combination with a door and transom unit, and

Figure 2 is a similar view but showing a broken main electrical circuit.

In both Figures 1 and 2 the door and transom unit is outlined by thedotted lines.

1 Claim. 200-98) Referring in detail to the parts, II designates thebase member of an enclosing cabinet and is made of any suitableinsulating material. L-shaped metal bracket members I2 and I3 aresecured to the said base member II by means of screws I4 and I5respectively. To the angular ends of the said brackets I2 and I3 thereare secured U-shaped members I6 and Il respectively. The U -shapedmember I6 is secured to the bracket I2 by means of the screw I8 andcomprises two prongs I9 and 20. The pron I9 is adapted to hold thereon acoil 2| which causes the prong I9 to become a magnet when the said coilis electrically energized.

The U-shaped member I1 is secured upon the bracket I3 by means of ascrew 22, and comprises two prongs 23 and 24. The prong 23 carries acoil 25, which causes said prong 23 to become a magnet when the coil 25is electrically energized.

Upon the prong 24 there is suitably, attached a projecting arm 26, whichcarries, pivotly attached to 21 upon the outer end thereof, an armaturehaving a long leg 28, and a short leg 29.

A block 30, carrying a slideably adjustable bar 3|, is mounted upon theprong 24, and is held thereon by means of a pin 32, and screws 33. Thesaid adjustable bar 3I may be securely held in any desired position bymeans of a set screw 34. A spring 35, is attached between the ends ofthe said adjustable bar 3|, and to the long leg 28 of the said armature.An electric conductor wire 36 is soldered or otherwise secured to thelong leg 28 of the armature and to one of the screws which hold theprojecting arm 26 to the said prong 24.

Electric current is supplied to the coil 25 by means of conductors 31and 38, which electrically connect same to a battery 39. Electriccurrent is supplied to the coil 2I by means of conductors 49, 4|, 42, 43and 44 when the armature is in the position shown in Figure 2, therebyclosing an electric circuit including the battery 45. An electricallyoperated alarm or signal 46 may be interposed, in parallel, between theconductors and 44.

The conductor 38 may be carried through, and

upon a door and transom as shown. The said door and transom areindicated by dotted lines in both figures. A switch 41, is interposed inthe conductor 40 of thesecondary or auxiliary circuit and is normallyclosed to operate the secondary circuit.

Operation The device is used in an electric signal system in which theelectrical conductors are wired through or upon windows, doors or anyportion of a room, building or receptacle which it is desired to protectagainst unauthorized entry.

In Figure l, the wiring or electric conductors are shown passing throughor upon doors, transoms or glass panels indicated by dotted lines, andwherein the said doors and transoms are shown in closed position, andthe conductor 38 makes contacts at all joints between the movable memberand the frame.

In the said closed position, an electric current is established in theprimary or main circuit, which includes the battery 39, the conductor37, the coil 25 and the conductor 38, which leads back to the battery39. The circuit thus established energizes the coil 25, to produce amagnetic attraction through the prong 23, which attraction in turn drawsand holds to it the short leg of the armature 29. As long as the circuitjust described is closed or unbroken the short leg 29 of the armature isheld in contact with the end of the magnetized prong 23. When, however,the circuit is broken by cutting or breaking the conductor, or byopening a door or transom as shown by the dotted lines in Figure 2, thebreak occurs at 48 and 49 at which time the coil '25 is deenergized andreleases the short leg 29 of the armature. The spring 35 then acts topull the aforesaid long leg 28 of the armature so that electricalcontact is made at the end of the prong 19. The secondary or constantcircuit is now closed and an electrical current is established throughthe armature contact with the prong l9, the bracket 52, the conductor43, the alarm device 46, the conductor 4|, across the switch 41, throughbattery 45, the conductor 42, the bracket I3, the prong 24 and theconductor 36 to armature leg 28.

Branch conductors 40 and 44 extending from the conductors 4| and 43connect with the coil 2| to electrically energize same and magnetize theprong 19 to attract and freeze or look the long leg 29 of the armatureagainst same, until released by opening switch 47.

The electric circuit thus established will cause a current to flowthrough the alarm 46 to activate same, the switch 41 being in closedposition.

Upon closing the transom, the contacts 48 and 49 will reestablish themain electric current to energize the coil 25 but will not pull theshort leg 29 of the armature into contact with the end of the prong 23until switch 47 is in the of! position, thus breaking the secondary orconstant circuit to stop sounding of the alarm ii In lieu of a bell asshown, a signal light or other sounding device may be employed.

I claim:

In asignal relay switch, comprising a base member of insulatingmaterial, a pair of supporting brackets attached thereto, prongedmembers secured to and extending from said brackets, a magnetic coilupon a prong of each of said pronged members, and arranged in parallelrelation to one another, an armature pivotally attached to the end ofthe prong of one of the said pronged members in juxtaposition to itsattached relay coil, the said relay coil being adapted, whenelectrically energized, to hold the said armature in contact with itscore, a rod slidable upon a block attached to the free prong of saidpronged member, a spring attached to and between the said slidable rodand pivoted armature to urge the said armature out of contact with oneof the relay cores when same is deenergized and bring the opposite endof said armature into contact with the prong core of a second relay andclose a circuit through said second relay core.

JACK MEVORACH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 215,120 Hall May 6, 1879 585,171Arnold June 29, 1897 959,787 Nicholson May 31, 1910 1,153,505 LevisonSept. 14, 1915 1,165,098 Herr Dec. 21, 1915 1,223,789 Heiss Apr. 24,1917 1,238,823 Roeder Sept. 4, 1917 1,966,730 Mason July 17, 19342,237,644 Whipple Apr. 8, 1941 2,312,902 Hickmann Mar. 2, 1943 2,407,418Hanff Sept. 10, 1946 2,431,025 Buell Nov. 18, 1947 FOREIGN PATENTSNumber Country Date 285,478 Germany July 3, 1915

